Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 623 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
2. 2.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
3. 3.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) not enough info (b) 8 (c) 4 (d) 40
4. 4.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) no mango is sweet (c) yes, it is certain (d) yes, mangoes match
5. 5.🧩 Vihaan bought 2 pens and a cap for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) not enough info (c) ₹120 (d) ₹118
6. 6.🧩 Nisha bought 3 mangoes for ₹90 in all. Each mango cost the same. What did one mango cost? (a) ₹90 (b) ₹30 (c) not enough info (d) ₹35
7. 7.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) your handwriting (d) the colour of ink
8. 8.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
9. 9.🧩 Kabir bought 3 markers and a cap for ₹65 in all. Each marker cost the same. What did one marker cost? (a) ₹62 (b) not enough info (c) ₹65 (d) ₹21
10. 10.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) not enough info (b) 16 (c) 80 (d) 8
11. 11.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
12. 12.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) not enough info (b) 8 PM (c) 7 PM (d) 6 PM
13. 13.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) all dogs are mean (d) dogs hate you
14. 14.🧩 Vihaan bought 3 kites for ₹45 in all. Each kite cost the same. What did one kite cost? (a) ₹15 (b) not enough info (c) ₹45 (d) ₹20
15. 15.🧩 Ananya is 8 years old. Rohan is 6 years older than Ananya. How old is Rohan? (a) 6 (b) 15 (c) not enough info (d) 14
16. 16.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
17. 17.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
18. 18.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
19. 19.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
20. 20.🧩 Diya is 11 years old. Aarav is older than Diya. How old is Aarav? (a) not enough info (b) 13 (c) 16 (d) 12
21. 21.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
22. 22.🧩 Rohan is 6 years old. Vihaan is older than Rohan. How old is Vihaan? (a) not enough info (b) 11 (c) 7 (d) 8
23. 23.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) guessing (d) asking one friend
24. 24.🧩 Diya bought 3 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) ₹20 (c) not enough info (d) ₹25
25. 25.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
26. 26.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess
27. 27.🧩 Rohan is 6 years old. Tara is older than Rohan. How old is Tara? (a) 8 (b) 11 (c) 7 (d) not enough info
28. 28.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
29. 29.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
30. 30.🧩 Kabir bought 2 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹60 (b) ₹35 (c) not enough info (d) ₹30
31. 31.🧩 A box has 3 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 16 (b) 12 (c) 7 (d) not enough info
32. 32.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
33. 33.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
34. 34.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) not enough info (b) 7 (c) 14 (d) 70
35. 35.🧩 Vihaan is 7 years old. Meera is 6 years older than Vihaan. How old is Meera? (a) not enough info (b) 6 (c) 14 (d) 13
36. 36.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 8 PM (d) 9 PM
37. 37.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 2 PM (c) 5 PM (d) 4 PM
38. 38.🧩 Aarav bought 3 balls and a bag for ₹105 in all. Each ball cost the same. What did one ball cost? (a) ₹102 (b) ₹105 (c) not enough info (d) ₹35
39. 39.🧩 Nisha bought 4 mangoes for ₹140 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹40 (c) ₹140 (d) ₹35
40. 40.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False

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